public class Example {
	public static void main(String args[]) {
		ChinaPeople chinaPeople=new ChinaPeople();
		AmericanPeople americanPeople=new AmericanPeople();
		BeijingPeople beijingPeople=new BeijingPeople();
		chinaPeople.speakHello();
		americanPeople.speakHello();
		beijingPeople.speakHello();
		chinaPeople.averageHeight();
		americanPeople.averageHeight();
		beijingPeople.averageHeight();
		chinaPeople.averageWeight();
		americanPeople.averageWeight();
		beijingPeople.averageWeight();
		chinaPeople.chinaGongfu();
		americanPeople.americanBoxing();
		beijingPeople.beijingOpera() ;
		beijingPeople.chinaGongfu();
	}
}



//public class Example {
//    public static void main(String[] args) {
//        People p = new People();
//        ChinaPeople cp = new ChinaPeople();
//        AmericanPeople ap = new AmericanPeople();
//        BeijingPeople bp = new BeijingPeople();
//
//        p.speakHello();
//        cp.speakHello();
//        ap.speakHello();
//        bp.speakHello();
//
//        p.averageHeight();
//        cp.averageHeight();
//        ap.averageHeight();
//        bp.averageHeight();
//
//        p.averageWeight();
//        cp.averageWeight();
//        ap.averageWeight();
//        bp.averageWeight();
//    }
//}